769666321 has 2 divisors, whose sum is σ = 769666322. Its totient is φ = 769666320.

The previous prime is 769666291. The next prime is 769666349. The reversal of 769666321 is 123666967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716900625 + 52765696 = 26775^2 + 7264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-769666321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (769666361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384833160 + 384833161.

It is an arithmetic number, because the mean of its divisors is an integer number (384833161).

Almost surely, 2^769666321 is an apocalyptic number.

It is an amenable number.

769666321 is a deficient number, since it is larger than the sum of its proper divisors (1).

769666321 is an equidigital number, since it uses as much as digits as its factorization.

769666321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 769666321 is about 27742.8607212739. The cubic root of 769666321 is about 916.4332285945.

The spelling of 769666321 in words is "seven hundred sixty-nine million, six hundred sixty-six thousand, three hundred twenty-one".